﻿using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Text;

namespace Newtonsoft.Json.Serialization
{
  internal class TraceJsonReader : JsonReader, IJsonLineInfo
  {
    private readonly JsonReader _innerReader;
    private readonly JsonTextWriter _textWriter;
    private readonly StringWriter _sw;

    public TraceJsonReader(JsonReader innerReader)
    {
      _innerReader = innerReader;

      _sw = new StringWriter(CultureInfo.InvariantCulture);
      _textWriter = new JsonTextWriter(_sw);
      _textWriter.Formatting = Formatting.Indented;
    }

    public string GetJson()
    {
      return _sw.ToString();
    }

    public override bool Read()
    {
      var value = _innerReader.Read();
      _textWriter.WriteToken(_innerReader, false, false);
      return value;
    }

    public override int? ReadAsInt32()
    {
      var value = _innerReader.ReadAsInt32();
      _textWriter.WriteToken(_innerReader, false, false);
      return value;
    }

    public override string ReadAsString()
    {
      var value = _innerReader.ReadAsString();
      _textWriter.WriteToken(_innerReader, false, false);
      return value;
    }

    public override byte[] ReadAsBytes()
    {
      var value = _innerReader.ReadAsBytes();
      _textWriter.WriteToken(_innerReader, false, false);
      return value;
    }

    public override decimal? ReadAsDecimal()
    {
      var value = _innerReader.ReadAsDecimal();
      _textWriter.WriteToken(_innerReader, false, false);
      return value;
    }

    public override DateTime? ReadAsDateTime()
    {
      var value = _innerReader.ReadAsDateTime();
      _textWriter.WriteToken(_innerReader, false, false);
      return value;
    }

#if !NET20
    public override DateTimeOffset? ReadAsDateTimeOffset()
    {
      var value = _innerReader.ReadAsDateTimeOffset();
      _textWriter.WriteToken(_innerReader, false, false);
      return value;
    }
#endif

    public override int Depth
    {
      get { return _innerReader.Depth; }
    }

    public override string Path
    {
      get { return _innerReader.Path; }
    }

    public override char QuoteChar
    {
      get { return _innerReader.QuoteChar; }
      protected internal set { _innerReader.QuoteChar = value; }
    }

    public override JsonToken TokenType
    {
      get { return _innerReader.TokenType; }
    }

    public override object Value
    {
      get { return _innerReader.Value; }
    }

    public override Type ValueType
    {
      get { return _innerReader.ValueType; }
    }

    public override void Close()
    {
      _innerReader.Close();
    }

    bool IJsonLineInfo.HasLineInfo()
    {
      IJsonLineInfo lineInfo = _innerReader as IJsonLineInfo;
      return lineInfo != null && lineInfo.HasLineInfo();
    }

    int IJsonLineInfo.LineNumber
    {
      get
      {
        IJsonLineInfo lineInfo = _innerReader as IJsonLineInfo;
        return (lineInfo != null) ? lineInfo.LineNumber : 0;
      }
    }

    int IJsonLineInfo.LinePosition
    {
      get
      {
        IJsonLineInfo lineInfo = _innerReader as IJsonLineInfo;
        return (lineInfo != null) ? lineInfo.LinePosition : 0;
      }
    }
  }
}